“Douglas Waller’s fast-paced and deeply-researched narrative of Union intelligence operations in the Eastern theater of the Civil War cuts through the myths and fabrications that grew up around "Lincoln’s spies" and presents a professional, readable appraisal that emphasizes the positive contributions that Colonel George Sharpe and Richmond Unionist Elizabeth Van Lew made to ultimate Northern victory. This book is vital reading for anyone interested in the Civil War or in the origins of modern spycraft.”—James M. McPherson, Pulitzer Prize-winning author of Battle Cry of Freedom: The Civil War Era and The War That Forged a Nation